AS 680/682
Description, Operation and Maintenance Record and Replay
ADS−B
4−83Ed. 10.07
4.6.7.2 ARP Notebook Page ’Data Parameter’
The notebook page ’Data Parameter’, see Fig. 4−109, provides packing, time scheduling and filter
options.
Fig. 4−109 ARP, Data Parameter (example)
S It is possible to pack several records of the input into one ASTERIX CAT 21 data block. If packing
is disabled, the data will be replayed as found in the input, else as many data records will be packed
into one ASTERIX data block as selected in the selection box. When the end of an input file is
reached, the remaining records are sent in one block, even if this data block is smaller than the
required number.
S The option ’Multiply replay time by the factor’ is explained in section 4.6.4.2.1 . This is the only fea-
ture of this page, which is applicable for binary replay, too.
In case of binary replay, the replay factor indicates the periods in seconds, when the next binary
decoded ASTERIX data block is to be sent. The differentiation of binary ASTERIX data blocks is
possible by evaluation of their length fields. The evaluation of the length field is needed to avoid
an uncontrolled flush of the input to network.
S ’Time Scheduling’ is explained in section 4.6.4.2.2 .
S The second enumeration item in section 4.6.4.2.3 explains the mode S filter functionality.
S It is possible to mark the data sent by the ARP−tool as simulated. If the check box is enabled, then
the subfield SIM of the field ’Target Report Descriptor’ is set to 1, else to 0.
S The radio buttons ASTERIX CAT 21 version allow to select the edition, which shall be replayed. It
is possible to replay edition 0.20 or edition 0.23 data. It is very important that the selected version
is consistent with the data to be replayed, because otherwise data can go lost or get confused.
There is no possibility by the tool to differentiate between ed. 0.20 and 0.23 due to information of
the file to be replayed.
S The choice of the time base feature is explained in section 4.6.5.5.
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